Portion of a vacuum cleaner



FIG. 1 is a front elevational view of a portion of a vacuum cleaner showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a front elevational view thereof showing the door valve in an alternative position. 

The ornamental design for a portion of a vacuum cleaner, as shown and described. 